JP5605620B2 - Electrical junction box - Google Patents

Description

  The present invention relates to an electrical junction box including a bus bar that constitutes an internal circuit, and more particularly to an electrical junction box in which an electrical component mounting portion from which a bus bar protrudes is provided on the surface of a case.

  2. Description of the Related Art Conventionally, an electrical connection box mounted on an automobile is known that includes a bus bar that constitutes an internal circuit. For example, the junction box described in Japanese Patent Application Laid-Open No. 2007-244039 (Patent Document 1) is that. Such an electrical connection box can be connected to an electrical component such as a connector or a fuse by projecting a connection portion of the bus bar to an electrical component mounting portion provided on the surface of the case.

  By the way, the electrical connection box of the conventional structure is a bus bar stack in which a plurality of bus bars are stacked via an insulating plate in order to accommodate a larger number of bus bars in a limited arrangement region while preventing a short circuit between the bus bars. It was housed in the case as a body. However, such a structure causes an increase in the thickness dimension of the electrical junction box, and there is a problem that it cannot sufficiently respond to the recent demand for miniaturization of the electrical junction box. In addition, since a plurality of insulating plates are required, the number of parts and the number of assembling steps are increased, resulting in an increase in manufacturing cost.

  Therefore, in order to arrange the bus bars in a space efficient manner, for example, the vertical bus bars described in Japanese Patent Laid-Open No. 2002-101526 (Patent Document 2) and Japanese Patent Laid-Open No. 9-154217 (Patent Document 3) should be adopted. Can be considered. However, in the case of the junction box or the like described in Patent Document 1, it does not have an insulating member that is thick enough to accommodate the vertical bus bar, and an attempt to adopt the vertical bus bar results in an increase in thickness. It is not appropriate.

  Furthermore, since an electrical connection box such as a junction box has an electrical component mounting portion provided in the case, when a vertical bus bar is employed, a lock portion such as a lance for fixing the vertical bus bar is formed in the case. There is a need. However, if you try to form the lock part in the case, the mold will be matched from both the front and back sides of the case with the lock part in between, and a die-cut opening will be formed on the surface of the case. There was a problem. As described above, further examination is necessary to adopt the vertical bus bar in the electrical connection box such as the junction box.

JP 2007-244039 A JP 2002-101526 A Japanese Patent Laid-Open No. 9-154217

  The present invention has been made in the background of the above-mentioned circumstances, and the solution is to open the case surface or increase the thickness of the case in a structure in which the electrical component mounting portion is provided on the surface of the case. It is an object of the present invention to provide an electric junction box having a novel structure in which a vertical bus bar can be provided without incurring any problems.

  According to a first aspect of the present invention, a bus bar constituting an internal circuit is accommodated in a case, and a connecting portion protruding from the bus bar is opened in the electric component mounting portion formed on the surface of the case. In the electrical junction box that protrudes outward from the case, a vertical bus bar portion in which the bus bar is disposed perpendicular to the case, and an intermediate portion of the vertical bus bar portion opposite to the connection portion And a projecting tip of the support projecting piece is bent to form a sandwiching portion, while the case opens to the back surface of the case and A bus bar housing groove extending at a predetermined depth toward the surface side is formed, and the vertical bus bar portion of the bus bar is inserted into the bus bar housing groove, and the support protrusion is held between There that is sandwiched between the insulating member is superposed on the back surface and back surface of the case, characterized.

  According to the present invention, the vertical bus bar portion of the bus bar is accommodated in the bottomed bus bar accommodating concave groove opened on the back surface of the case. Accordingly, the bus bar can be disposed perpendicular to the case without opening the surface of the case. As a result, it is possible to arrange the bus bars in a space-efficient manner while ensuring waterproofness and the like, and the electrical connection box can be downsized.

  The vertical bus bar portion is provided with a support protrusion that protrudes on the opposite side of the connection portion, and the sandwiching portion provided at the protruding tip of the support protrusion overlaps the case and its back surface. It was made to be held between members. As a result, when an external electric component such as a fuse is connected to the connection portion, if a pushing force is exerted on the vertical bus bar portion, the holding portion is supported by the insulating member, thereby the case of the vertical bus bar portion. Inward bending can be prevented. On the other hand, when the external electric component is removed from the connecting portion, the holding portion is supported by the back surface of the case, so that the vertical bus bar portion can be prevented from bending outward. As a result, it is possible to ensure the supporting stability of any connection and removal of the external electrical component to and from the connection portion without forming a lock portion for fixing the bus bar as in the conventional structure. As a result, the vertical bus bar can be stably assembled to an insulating member that does not have a wall thickness that can form a lock portion, such as a junction box case.

  The vertical bus bar portion in the present invention may be a flat bus bar having a flat plate shape partially raised, or the entire bus bar may be a vertical bus bar portion. Further, the present invention may be used in combination with a conventionally known bus bar laminate in which a plurality of flat bus bars are laminated via insulating plates. In such a case, the outermost layer of the bus bar laminate may be used. The positioned insulating plate can also be used as an insulating member for holding the holding portion.

  According to a second aspect of the present invention, in the one described in the first aspect, a flat bus bar disposed in parallel to the case is disposed on an opening of the bus bar housing groove, The vertical bus bar portion of the bus bar inserted into the bus bar housing groove is supported by the support protrusion, and thus is disposed with a gap with respect to the flat bus bar.

  That is, according to the present invention, the vertical bus bar portion is supported by the support protrusions, so that it can be stably positioned in the bus bar housing concave groove. And even when an electrical component is connected to the connection part and a pushing force is exerted on the vertical bus bar part, the air insulation distance between the vertical bus bar part and the flat bus bar can be stabilized by supporting the vertical bus bar part with the support protrusion. Can be secured. As a result, the vertical bus bar portion and the flat bus bar can be directly stacked without using an insulating plate or the like, so that the number of parts can be reduced and a plurality of bus bars can be more efficiently disposed. Therefore, the electrical junction box can be reduced in size.

  According to the present invention, the bus bar housing groove is formed on the back surface of the case having the electrical component mounting portion formed on the front surface, and the vertical bus bar portion of the bus bar is inserted into the bus bar housing groove. Accordingly, the vertical bus bar can be disposed in the case while ensuring the waterproofness of the case. At the same time, the holding portion of the protruding tip portion of the support protrusion protruding from the vertical bus bar portion is held between the case and the insulating member. As a result, without providing a lock portion for fixing the bus bar in the case, it is possible to perform stable insertion / removal while suppressing bending of the vertical bus bar portion when inserting / removing electrical components, and the meat that can form the lock portion A vertical bus bar can also be provided in a case having no thickness. As a result, it is possible to arrange the bus bars more efficiently, and the electrical connection box can be downsized.

The disassembled perspective view of the electrical-connection box as one Embodiment of this invention. The bottom view of the state which assembled | attached the bus bar to the upper case of the electrical-connection box shown in FIG. Cross-sectional explanatory drawing equivalent to the III-III cross section in FIG. Cross-sectional explanatory drawing equivalent to the IV-IV cross section in FIG. FIG. 3 is a perspective view of the bus bar shown in FIG. 2.

  Embodiments of the present invention will be described below with reference to the drawings.

  First, FIG. 1 shows a junction box 10 according to an electrical junction box as one embodiment of the present invention. The junction box 10 has a structure in which an insulating plate 16 as an insulating member is accommodated between an upper case 12 and a lower case 14.

  The upper case 12 is made of a non-conductive synthetic resin and has a substantially box shape that opens toward the lower case 14 side. On the outer peripheral surface of the upper case 12, a plurality of lock portions 15 having conventionally known locking claws are formed at appropriate positions. The upper case 12 is provided with a plurality of connector mounting portions 18, fuse mounting portions 20, relay mounting portions 22, and fusible link mounting portions 24 as electrical component mounting portions. As shown in FIG. 2, the connector mounting portion 18, the fuse mounting portion 20, the relay mounting portion 22, and the fusible link mounting portion 24 are connected through a terminal insertion hole 26 that penetrates the upper case 12 as conventionally known. An opening is formed on the surface 28 of the upper case 12. In addition, on the back surface 30 of the upper case 12, a pair of screw bosses 31, 31 are disposed in the longitudinal direction of the upper case 12 (in FIG. 2) at a substantially central portion in the width direction (vertical direction in FIG. 2) of the upper case 12. , In the left-right direction) and projecting from the back surface 30 at a predetermined distance. In order to facilitate understanding, in the enlarged view of FIG. 2, bus bar-accommodating grooves 32a and 32b, which will be described later, and the back surface 30 existing between the grooves between them are shown by shading.

  Further, on the back surface 30 of the upper case 12, bus bar housing grooves 32a and 32b are formed. Each of the bus bar housing grooves 32a and 32b has a groove shape extending straight in the longitudinal direction of the upper case 12 (left and right in FIG. 2), and includes a connector mounting portion 18, a fuse mounting portion 20, and a relay mounting portion. 22, so as to avoid the fusible link mounting portion 24, the mounting portions 18, 20, 22, 24 are formed in the non-formed portions. The bus bar housing concave grooves 32a and 32b in the present embodiment are long grooves having a length of about 1/3 of the longitudinal dimension of the upper case 12 (the lateral dimension in FIG. 2).

  As shown in FIG. 3 and FIG. 4, the bus bar housing concave grooves 32 a and 32 b have a bottomed groove shape that opens on the back surface 30 of the upper case 12 but does not open on the front surface 28. In FIGS. 3 and 4, the lower case 14 is omitted and the insulating plate 16 is simply shown for easy understanding. The bus bar housing concave grooves 32a and 32b have substantially constant width dimensions (dimensions in the horizontal direction in FIGS. 3 and 4) and depth dimensions (dimensions in the vertical direction in FIGS. 3 and 4). The width dimension of the bus bar receiving grooves 32a and 32b is slightly larger than the thickness dimension of the metal plate forming the vertical bus bar parts 44a and 44d so that the vertical bus bar parts 44a and 44d described later can be easily inserted. Yes. Further, in the bus bar housing concave grooves 32a and 32b, the depth dimension from the back surface 30 to the front surface 28 is the height dimension of the vertical bus bar portions 44a and 44d including the support protrusions 46 described later (in FIG. 3 and FIG. Larger than the direction dimension).

  A plurality of bus bars 34 are assembled to the back surface 30 of the upper case 12. FIG. 5 shows a bus bar 34 a which is one of the plurality of bus bars 34. The bus bar 34a is formed by press punching a metal plate into a desired circuit shape. Flat busbar portions 36a, 36b, 36c, and 36d having a flat plate shape are formed on the bus bar 34a. These flat bus bar portions 36a to 36d are all formed on the same plane. As is known in the art, a tab terminal 38 as a connecting portion and a positioning pin 40 are bent and protruded from the flat bus bar portion 36a. Further, the flat bus bar portion 36b is provided with two tuning fork terminals 42 as connecting portions where a pair of press contact blades are opposed to each other, and positioning pins 40 which are bent and protruded. Further, one tuning fork terminal 42 is projected from the flat bus bar portion 36d. Note that the tab terminal 38 and the tuning fork terminal 42 in the present embodiment are raised by bending the protruding pieces protruding from the end edge portions of the flat bus bar portions 36a, 36b, 36d, thereby raising the flat bus bar portions 36a, 36b. 36d, the tab terminal 38 and the tuning fork terminal 42 are formed of a metal plate separate from the flat bus bar portions 36a, 36b, 36d, as is conventionally known, and the flat bus bar portions 36a, 36b are formed. , 36d may be fixed.

  A vertical bus bar portion 44a is formed between the flat bus bar portions 36a and 36b. Similarly, vertical bus bar portions 44b and 44c are formed between the flat bus bar portions 36b and 36c and between the flat bus bar portions 36c and 36d, respectively. These vertical bus bar portions 44a to 44c have a gate shape that rises perpendicularly to the flat bus bar portions 36a to 36d, and a flat bus bar 34a punched from a metal plate is partially bent and raised. Is formed by. Further, the vertical bus bar portions 44a to 44c extend in a straight line, and connect the flat bus bar portions 36a to 36d.

  Further, a support protrusion 46 is formed at a substantially central portion in the longitudinal direction of the vertical bus bar portion 44a. The support protrusion 46 protrudes from the vertical bus bar portion 44a in a direction opposite to the protrusion direction (upward in FIG. 5) of the tab terminal 38 and the tuning fork terminal 42 with a predetermined protrusion dimension: L (see FIG. 3). It has a protruding piece shape. Then, the protruding tip of the support protrusion 46 is bent at a right angle, so that the protruding tip edge of the support protrusion 46 has a flat plate-like sandwich that protrudes perpendicular to the protruding direction from the vertical bus bar portion 44a. A portion 48 is formed. Thereby, the support protrusion 46 is L-shaped in a side view. In addition, the protrusion dimension: L from the vertical busbar part 44a of the support protrusion 46 in this embodiment is set to the magnitude | size by which the clamping part 48 is located on the same plane as the flat busbar parts 36a-36d.

  As shown in FIGS. 2 to 4, in such a bus bar 34 a, the vertical bus bar portion 44 a is inserted into the bus bar accommodating groove 32 a of the upper case 12. Then, the flat bus bar portions 36 a to 36 d are superimposed on the back surface 30 of the upper case 12 and assembled to the upper case 12. As a result, the vertical bus bar portion 44 a is disposed perpendicular to the upper case 12, and the flat bus bar portions 36 a to 36 d are disposed parallel to the upper case 12. The amount of insertion of the vertical bus bar portion 44a into the bus bar accommodating groove 32a is defined by the holding portion 48 and the flat bus bar portions 36a to 36d coming into contact with the back surface 30 of the upper case 12. Further, the tab terminal 38 of the flat bus bar portion 36a is inserted into the terminal insertion hole 26 of the connector mounting portion 18a and protrudes toward the outside of the upper case 12 in the connector mounting portion 18a. Similarly, the tuning fork terminals 42, 42 of the flat bus bar portion 36b are inserted into the terminal insertion holes 26, 26 of the relay mounting portions 22a, 22b and directed outward of the upper case 12 in the relay mounting portions 22a, 22b. Protruding. Further, the tuning fork terminal 42 of the flat bus bar portion 36d is inserted into the terminal insertion hole 26 of the fuse mounting portion 20a and protrudes outward of the upper case 12 in the fuse mounting portion 20a.

  Further, in the present embodiment, the positioning pin 40 is inserted into the positioning hole 50 opened in the back surface 30 of the upper case 12 without requiring a special pushing force, and the bus bar 34a is positioned with respect to the upper case 12. It has come to be. For example, the positioning pin 40 is press-fitted and fixed to the positioning hole 50, or an engagement hole is provided at an appropriate position of the flat bus bar portions 36a to 36d so that the engagement hole protrudes from the back surface 30 of the upper case 12. The bus bar 34a is positioned on the upper case 12 by engaging with the engaging protrusion, and the bus bar 34 is prevented from being detached from the upper case 12 even when the back surface 30 of the upper case 12 is directed vertically downward. good.

  Similarly, the vertical bus bar portion 44d of the bus bar 34b is inserted into the bus bar accommodating groove 32b. Although detailed illustration is omitted, the bus bar 34b has substantially the same structure as the bus bar 34a, and a structure in which a pair of flat bus bar portions 36e and 36f (see FIG. 2) are connected by a vertical bus bar portion 44d. It is said that. In the flat bus bar portion 36e, a tab terminal 38 is formed at an end opposite to the vertical bus bar portion 44d, and a positioning pin 40 is formed in an intermediate portion. On the other hand, in the flat bus bar portion 36f, a tuning fork terminal 42 is formed at an end opposite to the vertical bus bar portion 44d, and a positioning pin 40 and a tab terminal 38 are formed in an intermediate portion. As in the case of the bus bar 34a, a support protrusion 46 is formed at a substantially longitudinal center portion of the vertical bus bar portion 44d.

  The flat bus bar portions 36e and 36f of the bus bar 34b are overlapped with the back surface 30 of the upper case 12, so that the tab terminal 38 of the flat bus bar portion 36e protrudes in the connector mounting portion 18b. Further, the tuning fork terminal 42 of the flat bus bar portion 36f protrudes in the fuse mounting portion 20b, and the tab terminal 38 protrudes in the connector mounting portion 18a.

  A plurality of bus bars 34 are further assembled to the back surface 30 of the upper case 12 to which the bus bars 34a and 34b are assembled. The bus terminals 34 are appropriately formed with the tab terminal 38, the tuning fork terminal 42, the positioning pin 40, the vertical bus bar portion 44, and the like as required. In particular, the bus bars 34c, 34d, 34e disposed in the vicinity of the support protrusions 46, 46 of the bus bars 34a, 34b are conventionally known flat bus bars, have a substantially flat plate shape as a whole, and have appropriate positions. A tab terminal 80, a tuning fork terminal 42, a positioning pin 40, and the like are provided in a protruding manner. The bus bars 34c to 34e are disposed so as to overlap both or one of the openings of the bus bar housing grooves 32a and 32b, and the bus bars 34c and 34d are disposed across the bus bar housing groove 32a and the bus bar housing groove 32b. On the other hand, the bus bar 34e is disposed so as to overlap with the opening of the bus bar housing groove 32b. As described above, the flat bus bar portions of the plurality of bus bars 34 including the bus bars 34 a and 34 b are all arranged in parallel to the upper case 12 on the same plane superimposed on the back surface 30.

  The insulating plate 16 is superimposed on the back surface 30 of the upper case 12 as described above. The insulating plate 16 has a substantially plate shape corresponding to the shape of the upper case 12 made of non-conductive synthetic resin. Although illustration is omitted, a plurality of metal terminals project from the insulating plate 16, and these metal terminals are connected to a single core wire arranged on the back surface of the insulating plate 16. Then, by covering the upper case 12 on the insulating plate 16, the metal terminals protruding from the insulating plate 16 are protruded in the mounting portions 18, 20, 22, 24 through the terminal insertion holes 26. That is, the metal terminal provided in the insulating plate 16 is inserted into the terminal insertion hole 26 in which no terminal is inserted in FIG. As schematically shown in FIGS. 3 and 4, a peripheral wall 51 protruding toward the upper case 12 side is continuously formed on the outer peripheral edge of the insulating plate 16 over the entire circumference. On the other hand, notches 52 are formed at a plurality of locations on the outer peripheral portion of the upper case 12, and the insulating plate 16 is positioned with respect to the upper case 12 by the peripheral wall 51 entering the notches 52.

  Further, as shown in FIG. 1, the lower case 14 is made of a non-conductive synthetic resin and has a substantially box shape that opens toward the upper case 12. In the outer peripheral portion of the lower case 14, a lock portion 53 having a conventionally known recess that engages with a locking claw of the lock portion 15 is formed at a position corresponding to the lock portion 15 of the upper case 12. Further, screw insertion holes 54 and 54 (only one of them is shown in FIG. 1) are provided in the lower case 14 at positions corresponding to the screw bosses 31 and 31 (see FIG. 2) formed in the upper case 12. Yes.

  Then, the upper case 12 and the lower case 14 are assembled with the insulating plate 16 interposed therebetween, whereby the insulating plate 16 is accommodated between the upper case 12 and the lower case 14. The upper case 12 and the lower case 14 are locked to each other at the lock portions 15 and 53, and screwed bosses 31 and 31 provided on the upper case 12 are inserted into an insertion hole (not shown) that penetrates the insulating plate 16. And overlapped with the screw insertion holes 54 of the lower case 14. A fixing screw (not shown) is inserted into the screw insertion holes 54 and 54 from the lower case 14 side and screwed to the screw bosses 31 and 31 so that the upper case 12 and the lower case 14 are screwed to each other. It has become.

  As shown in the example of the bus bar 34 a in FIG. 3, when the insulating plate 16 is superimposed on the back surface 30 of the upper case 12, the holding portion 48 of the support protrusion 46 is narrowed between the back surface 30 and the insulating plate 16. Be held. As a result, the vertical bus bar portion 44a is supported by the support protrusions 46, and is disposed inward (upward in FIG. 3) from the back surface 30 in the bus bar housing groove 32a. At the same time, the flat bus bar portions 36a to 36f in the bus bars 34a and 34b, and the flat bus bar portions that are superimposed on the back surface 30 of the upper case 12 and arranged in parallel to the back surface 30 in the other bus bars 34, Between 16 is held. As a result, the plurality of bus bars 34 are fixed in the junction box 10, and the plurality of bus bars 34 including the bus bars 34 a and 34 b constitute an internal circuit 56 of the junction box 10. Then, as shown in FIG. 4, the vertical bus bar portion 44a is supported by the support protrusions 46, whereby a predetermined air insulation distance: d is given to the bus bars 34c and 34d superimposed on the bus bar housing concave groove 32a. Spaced apart. Similarly, the vertical bus bar 44d of the bus bar 34b is also disposed with a predetermined gap with respect to the bus bars 34c, 34d, and 34e superimposed on the bus bar receiving groove 32b.

  According to the junction box 10 having the structure according to the present embodiment, the vertical bus bar portion 44a is formed on the bus bar 34a, and is inserted into the bottomed bus bar receiving concave groove 32a. As a result, the vertical bus bar portion 44 a can be disposed perpendicular to the upper case 12 without opening the surface 28 of the upper case 12. As a result, the bus bar 34a can be disposed in a space-efficient manner while ensuring waterproofness and the like. In particular, in the present embodiment, it is difficult to secure an area enough to provide a flat bus bar extending between the plurality of connector mounting portions 18 and the plurality of relay mounting portions 22 arranged in the longitudinal direction of the upper case 12. By forming the bus bar accommodating concave groove 32a in the narrow area and arranging the vertical bus bar portion 44a, the long bus bar 34a straddling the connector mounting portion 18a and the fuse mounting portion 20a which are largely separated in the longitudinal direction of the upper case 12 is provided. It is possible to arrange the space efficiently. Similarly, by inserting and arranging the vertical bus bar portion 44d in the bus bar housing concave groove 32b, the long bus bar 34b straddling the connector mounting portion 18a and the connector mounting portion 18b can be disposed in a space efficient manner. . Hereinafter, the effects described for the bus bar 34a can be similarly achieved for the bus bar 34b unless otherwise specified.

  Further, the vertical bus bar portion 44 a is supported in the bus bar housing concave groove 32 a by the support protrusion 46, and the support protrusion 46 is insulated from the back surface 30 of the upper case 12. It is held between plates 16. Thus, when a connector is connected to the tab terminal 38 of the bus bar 34a, or when a fuse or a relay is connected to the tuning fork terminal 42, when the pressing force is exerted on the bus bar 34a, the holding portion 48 is insulated. By being supported by 16, it is possible to prevent the vertical bus bar portion 44a from being bent toward the back surface 30 side of the upper case 12. On the other hand, when a pulling force is applied to the bus bar 34a when a connector, a fuse, or the like is removed from the tab terminal 38 or the tuning fork terminal 42, the holding portion 48 is supported by the back surface 30 so that the vertical bus bar is supported. The bending of the portion 44a toward the surface 28 of the upper case 12 can be prevented. As a result, the vertical bus bar can be disposed while securing the stability against the insertion / extraction of the electrical components without providing the upper case 12 with a lock portion such as a lance for fixing the vertical bus bar as in the conventional structure. Further, since there is no lock portion as in the conventional structure, it is possible to easily remove the bus bar 34 from the upper case 12, and the maintenance can be improved.

  The support protrusion 46 can stably support the vertical bus bar portion 44a at a position separated from the back surface 30 in the bus bar housing groove 32a, so that the opening of the bus bar housing groove 32a is opened as shown in FIG. Even if another bus bar 34d is provided on the upper side, the air insulation distance d between the bus bar 34d and the vertical bus bar portion 44a can be stably maintained. Accordingly, the vertical bus bar portion 44a and the bus bars 34c and 34d (for the vertical bus bar portion 44d, the bus bars 34c, 34d, and 34e) can be directly stacked without interposing another member such as an insulating plate. As a result, it is possible to reduce the size of the junction box and reduce the manufacturing cost by reducing the number of parts. In particular, in the present embodiment, the upper case 12 and the lower case 14 are screwed to each other with the insulating plate 16 interposed therebetween, so that the holding portion 48 is made stronger and more stable by the back surface 30 of the upper case 12 and the insulating plate 16. Can be pinched. Furthermore, by supporting the substantially central portion in the longitudinal direction of the long vertical bus bar portion 44a with the support protrusion 46, it is possible to more effectively prevent the vertical bus bar portion 44a from being bent.

  As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited by the specific description. For example, in the above-described embodiment, the connection portions such as the tab terminal 38 and the tuning fork terminal 42 are formed in the flat bus bar portions 36a to 36b, and the insulating plate 16 and the back surface 30 have a wide area of the flat bus bar portions 36a to 36b. The contact portion can be more stably supported with respect to insertion / extraction of electrical components, but the connection portion may be formed on the vertical bus bar portion. In such a case, the flat bus bar portion is not always necessary, and the entire bus bar may be formed as a vertical bus bar. Further, a plurality of support protrusions may be formed on one vertical bus bar portion.

  The present invention can also be used in combination with a bus bar laminate in which a plurality of bus bars are laminated via insulating plates. In such a case, it is also possible to use the insulating plate disposed in the outermost layer of the bus bar laminated body as an insulating member that sandwiches the sandwiching portion of the support protrusion between the back surface of the case.

10: Junction box (electrical connection box), 12: Upper case, 14: Lower case, 16: Insulating plate (insulating member), 18: Connector mounting part (electrical part mounting part), 20: Fuse mounting part (electrical part mounting part) ), 22: Relay mounting portion (electrical component mounting portion), 24: Fusible link mounting portion (electrical component mounting portion), 30: Back surface, 32a, b: Bus bar accommodating groove, 34a, b: Bus bar, 34c to e : Bus bar (flat bus bar), 38: Tab terminal (connecting part), 42: Tuning fork terminal (connecting part), 44a to d: Vertical bus bar part, 46: Supporting protrusion, 48: Nipping part, 56: Internal circuit

Claims (2)

A bus bar constituting an internal circuit is accommodated in the case, and a connecting portion projecting from the bus bar is disposed so as to project outward from the case in an electrical component mounting portion formed in the surface of the case. In the electrical junction box
The bus bar includes a vertical bus bar portion disposed perpendicular to the case, and a support protrusion protruding toward the opposite side of the connection portion at an intermediate portion of the vertical bus bar portion. While the projecting tip of the is bent to constitute a clamping part,
The case is formed with a bus bar housing groove that opens at a back surface of the case and extends at a predetermined depth toward the surface side of the case.
The vertical bus bar portion of the bus bar is inserted into the bus bar housing concave groove, and the holding portion of the support protrusion is sandwiched between the back surface of the case and the insulating member superimposed on the back surface. Features an electrical junction box.   A flat bus bar disposed in parallel to the case is disposed on the opening of the bus bar housing groove, and the vertical bus bar portion of the bus bar inserted in the bus bar housing groove is the support protrusion. The electrical junction box according to claim 1, wherein the electrical connection box is disposed with a gap with respect to the flat bus bar by being supported.

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